Envelop



GAY, ENV ELOP. APPLICATION FILED AUG-2.6, IQIB'.

Patented 'May 13, 191% MARY GAY, 0F BUTTE, MONTANA.

ENVELOP.

Specification of Letters Patent.

Patented May 13, 1919.

Application filed August 26, 1918. Serial No. 251,525.

To all whom it may concern:

Be it known that I, MARY GAY, a citizen of the United States, residing at Butte, in the county of Silver Bow and State of Montana, have invented certain new and useful Improvements in Envelops, of which the following is a specificaton, reference being had to the accompanying drawings.

This invention relates to certain improvements in envelops and it is an object of the invention to provide a device of this general character having novel and improved means whereby the flaps may be maintained efl'ec tually held or locked in folded relation.

Furthermore, it is an object of the invention to provide a novel and improved envelop which can not be opened without de tection.

The invention consists in the details of construction and in the combination and ar rangement of the several parts of my improved envelop wherebycertain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure 1 is a view in top plan of a blank from which an envelop is produced in ac cordance with an embodiment ofmy invention Fig. 2 is a view in plan of theblank partly folded;

Fig. 3 is a view in rear elevation of the envelop in closed relation, the sealing tongue being partly folded back; and

Fig. 4 is a view in plan of a partly folded envelop constructed in accordance with a further embodiment of my invention.

As disclosed in the accompanying drawings 1 denotes a front or body flap of my improved envelop provided with the end flaps 2. Each of the flaps 2 is substantially in the form of a sector with its free radial margin substantially flush with the longitudinal margin ofthe front or body flap 1 with which the sealing side flap 3 is connected. 4: denotes the second side flap provided at substantially the longitudinal center of its outer margin with the elongated tongue 5.

The end flaps 2 in close proximity to their free radial margins are provided with the slits 6 substantially in the form of an L.

The stems A, of said slits are open at the outer ends of the flaps 2 and the foot portion B of said slits are reversely disposed and extend in a direction transversely of the body or front flap 1.

In assembling the envelop the flaps 2 are folded inwardly upon the body or front flap 1 with their free end portions overlying with the portions of the flaps 2 defined by the slits 6 interlocking. The marginal portions of the opposed faces of the flaps 2 when in assembled relation are provided with suitable adhesive as indicated at 7 whereby said flaps may be secured one to the other and thereby maintained in the desired folded relation. The side flap 4 is then folded upon the engaged flaps 2 and the marginal portions of the flap 4 at opposite sides of the tongue 5 is secured to the flaps 2 if desired by suitable adhesive as indicated at 7.

The sealing side flap 3 is-provided with the slot 8 disposed longitudinally thereof and positioned adjacent the apex of said flap. The tongue 5 is of a length to extend through said slot 8 when the sealing side flap is folded into closed position and to permit its free end portion to be folded back to overlie the apex position of the flap 3 and to be engaged with the outer face of the flap 4:- As herein disclosed the securing of the free end portion of the tongue 5 with the flap 4 is obtained by PIOVlding a face of the tongue 5 at its free end marginal portion with a suitable adhesive 9.

In the form of invention illustrated in Fig. l, the envelop is substantially the same construction as hereinbefore illustrated except that one of the end flaps 2 at substantially the center of its free marginal portion is provided with a tongue 10 adapted to be threaded through the parallel slots 11 formed in the free marginal portion of the second end flap 2. The tongue 10 is of a length to be bent back upon the first end flap 2 and suitably secured thereto and preferably through the medium of adhesive 12 carried by a face of the tongue 10 at the outer or free end marginal portion thereof.

From the foregoing description, it is thought to be obvious that an envelop constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with Which it may be assembled and operated and it Will also be obvious that my-invention is susceptible of some change and modification Without departing from the principles and spirit thereof and for this reason I do not Wish to be understood as limiting myself to the precise arrangement and forrnation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:

1. An envelop comprising a body portion provided with end flaps and side flaps, one.

of the end flapshavingparallel slots disposed transversely of the body portion, the 1 second end flap being provided. with a length to be returned vafter being threaded through the slotofthe first named side flap Gopieslof this potent may be obtained for five cents each, by addressing the for attachment to the second side flap, said first named fiap having its marginal portion at opposite sides of its tongue secured to the end flaps.

2. An envelop comprising a body portion provided With end flaps and side flaps, one of the end flaps having parallel slots disposed transversely of the body portion, the second end fiap being provided with a tongue adapted to thread through the slots of the first end flap when, said flaps are in folded position, said tongue being of a length to be returned, after being threaded through the slots of the second end flap, for

attachment to the second end flap, a side flap being provided with a single slot, the second side flap being provided with a tongue adapted to be threaded through the slot of the first named tongue when said side flaps are in folded position, said tongue be- Commissioner of Patents Washington, D. v.(H 

